refactor: hamt-ify credit approvals (#541) #1489

Job	Run time
license / License checks	13s
contracts-prettier / prettier	47s
build / Build IPC	13m 13s
contracts-deployment-test / build	2m 35s
contracts-sast / Slither check	1m 32s
contracts-storage / Storage layout check	2m 33s
contracts-sast / Solhint check	46s
extras / Demos: Axelar token	45s
contracts-test / tests	3m 44s
unit-tests / run	13m 28s
e2e-tests / run	5m 28s
docker-publish / Publish artifacts	18m 27s
	1h 3m 31s

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